Mining-drill



(No Model.) v 3 Sheets-Sheet 1. R. H. ELLIOTT 86 J. B. GARRINGTON.

MINING DRILL.

Patented Dec. 11,1894( m a W O m w awn 2 444,133

(NqModeL) I V 3 Sheets-Sheet 2.

R. H. ELLIOTT 861] B. GARRINGTUN.

' MINING DRILL.

1%.530510. 'Paterit gd Deo.l"1,1894.

"(No Model.) 3 Sheets-Sheet 3. R. H. ELLIOTT & J. B. CARRINGTON.

MINING DRILL.

No. 530,510. PatentedDec. 11,1894.

1 the device shown in Fig. 1.

l sents the outer end of the auger and attachin Fig. 10, along the line2' z of the said figproved drill.

ROBERT II. ELLIOTT, OF'

PAT NT Urrrcn.

BIRMINGHAM, AND JOHN B. CARRINGTON, OF

JASPER, ALABAMA.

MINING-DRILL.

SPECIFICATION forming part of Letters Patent No. 530,510, dated December11, 1 894. Application filed February 10, l894. Serial No. 499,815. (Nomodel.)

ToaZZ whom it may concern.-

Be it known that we, ROBERT H. ELLIOTT, residing at Birmingham, in thecounty of Jefferson, and J OHN B. CARRINGTON, residing at Jasper, in thecounty of Walker, State of Alabama, citizens of the United States, haveinvented certain new and useful Improvements in Mining-Drills; and we dohereby declare the following to be a full, clear, and exact descriptionof the invention, such as will enable others skilled in the art to whichit appertains to make and use the same.

Our invention relates to drills for mining purposes, and especially todrills intended for use in coal, shale, or other soft rock or mineral.

The purpose of our invention isto form an enlarged chamber or pocket atthe inner end of the hole drilled with an ordinary drill, and at thesame time to remove the ehippings that are formed in the process ofenlarging the said chamber or pocket.

Our invention will be understood by reference to the accompanyingdrawings in which the same parts are indicated by the samelettersthroughout the several views.

Figure 1 represents a side elevation of the pocket boring end of oneform of our im- Fig. 2 represents a view of the opposite side of thedrill from that shown in Fig. 1, and Fig. 3 represents a plan view ofFig.4 represents a section along the lines a; roof Figs. 1, 2, and 3,and looking to the right in the said figures. Fig. 5 represents a sideelevation of. the pocket boring end of another form of our improveddrill. Fig. 6 represents a plan view of the device shown in Fig. 5. Fig.7 reprements shown in Figs. 5 and 6. Fig. 8 represents an end view ofthe device shown in Fig. 7, and Fig. 9 represents a front view of theholding end of the bit shown in the two forms of bit illustrated inFigs. 1 to 6 of the drawings. Fig. 10 represents a central longitudialsection of another form of drill, constructed according to ourinvention. Fig. 11 represents a section of the device shown ure, andlooking to the right, and Fig. 12 represents a section along the line 2'z of ,Fig.

11 and looking to the right. i

In-all of the various forms of the device, the

drill is inserted into acylindrical hole bored by any of the usual formsof hand or machine drills, a cutting wing is extended laterally fromnear the end of the drill, and the shavings or chips are fed to an augerby suitable means, such as are hereinafter described.

. This auger works the chips or dust toward is provided with teeth 17adapted to engage in the coal or rock at the ehd of the hole which hasalready been drilled by a drill of the ordinary type. ing device B ispreferably hollowed out, and on the rear face a plurality of teeth 1'),sloping as shown, are provided.

The cutting wing C is pivoted as at c to the side of the bar A,.andterminates in a cutting point or edge 0'. The rear end of said wing Oterminates in an arm 0 to which the spiral springD is attached. Theother end of said spring is secured as at d to the side of the bar A,and the tendency of thesprin'g is to throw the cutting edge of the wingC outward. The bar Ais slotted as at a. to receive the screws e whichsecure the reciprocatin g block E to the said bar, the block having alimited longitudinal play regulated by the length of the slot 01., andthe height of the teeth I). The sai'dblock E is provided with two ormore teeth 6' meshing with the teeth I), and the said teeth are,normally kept in engagement by the spring F which is secured to the pinfprojecting from the barA into the slot e cut on the inside ofthereciprocating block E. The spring'is kept from revolving on thepinfby means of the stud of the arrows in the various figures, the teetha will ride up on the teeth b pushing the block E backward against thespring F, and

The inside of this hold ing pins b causing the inclined face e to pushthe chips in the direction of the auger. As soon as they get to theauger, they are carried by it out through the hole already drilled.

In the device shown in Figs. 5 and 6, the cutting wing O is providedwith a segmental rack 0 which gears in the worm 01 attached to thespindle D which is journaled as at d in thelug a attached to or integralwith the bar A. In this form of device the position of the wing O isregulated by the hand crank D mounted on the end of the spindle D asshown in Figs. 7 and 8. The said hand crank is held in any desiredposition by the ratchet wheel (1 and spring pawl D which may be bent toengage the ratchet Wheel as at d or may be constructed like any otherpawl and ratchet arrangement.

The device shown in Fig. 8 enables the ratchet to be turned in eitherdirection, and consequently the wing O to be swung out or in, but thesame effect might be obtained with an ordinary pawl which might belifted when the ratchet is to be turned backward.

The operation of the device shown in Figs.

5 to 8 is the same in all other respects, as that described withreference to Figs. 1 to 4. In the form of device shown in Figs. 10 to12, the operative parts are normally incased in a tube H which issecured by means of screws h to the groove 5 in the head B which ispressed against the end of the drilled hole, and may be provided withone or more hold- The cutting Wing O is fast to a spindle K which isrevolved through the desired angle in any convenient way, such forinstance, as the ratchet and pawl arrangement shown in Figs. 7 and 8.The outer end of this spindle K is journaled in 2. lug 11' secured inthe tube by screws h orin any other convenient way. TheaugerAis in thelower part of the tube, and in line with the open ing beneath the lug H.To the back of the cutting wing O, which is made hollow as at 0 aflexible apron M is attached, which is secured at its lower end to theplate m which is pivoted as at m, and is provided with lugs m projectingbeyond the sides h of the opening cut in the tube H, and thus isprevented from falling through the opening outward.

It will be evident that if the tube H be revolved in the direction ofthe arrow shown in Fig. 11, the wing G will cut the coal or soft rock,which will fall or be pushed through the opening 0 and striking theapron M will fall in the interior of the tube in front of the auger A.

E represents a vibrating block provided with teeth 6' meshing in theteeth of the fixed head 13*, to which the tube H is revolubly secured.This block E is pressed back by these teeth I) and is returned to theinitial position by the spring F which is secured to a lug f on theinterior of the tube H, and bears against a lug e on the reciprocatingblock E. It will be seen that as the tube revolves carryingwith it theblock, the latter willbe recipro= cated by the teeth b and spring F, andwill continuously feed the chippings falling from the apron M to theaugerA. It will thus be seen that the various devices herein describedall include an adjustable cutting wing, an anger for removing thechippings, and a device for feeding the chippings to the auger. It willbe obvious that these various functions may be performed in a greatvariety of ways, and that many modifications of the herein describeddevices might be made which could be used Without departing from thespirit of our invention.

Having thus described our invention, what We claim, and desire to securebyLetters Patent of the United States, is

1. In a drill of the character described,the combination with arevoluble wing or cutter and means for moving the same through an angleaxially, of an auger for removing the chips or cuttings, and areciprocating block adapted to .push said chips toward said auger,substantially as and for the purposes described.

2. In a drill of the character described, the combination with arevoluble wing or cutter and means for moving the same through an angleaxially, of an anger for removing the chips or cuttings, a reciprocatingblock provided with teeth at the base thereof, a ratchet engaging insaid teeth and adapted to press said block forward, and a spring adaptedto press said block backward, substantially as and for the purposesdescribed.

3. In a drill of the character described, the combination with arevoluble spindle or drill body, of a pivoted wing or cutter mountedthereon,means for swinging said pivotedwing outward from the axis ofsaid spindle or drill body, an anger for removing the chips or cuttings,and a reciprocating block adapted to push said chips toward said auger,substantially as and for the purposes described.

4. In a drill of the character described, the combination with arevoluble spindle or drill body, of a pivoted wing or cutter mountedthereon, means for swinging said pivoted wing outward from the axis ofsaid spindle ordrill body, an anger for removing the chips or cut tings,a reciprocating block provided with teeth at the base thereof, a ratchetengaging in said teeth and adapted to press said block forward, and aspring adapted to press said block backward, substantially as and forthe purposes described.

In testimony whereof we affix our signatures in presence of twoWitnesses.

ROBERT H. ELLIOTT. JOHN B. OARRINGTON.

WVitnesses to the signature of R. H. Elliott:

J. B. ROBINSON, H. F. WILsoN, Jr. W'itnesses to the signature of J. B.Car-rington:

G. B. MoOoRMAoK, J ESSE J. YEATES.

